import uuid

from sqlalchemy import (
    Boolean,
    Column,
    DateTime,
    ForeignKey,
    PrimaryKeyConstraint,
    String,
)
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func

from app.database import Base


class User(Base):
    __tablename__ = "users"

    id = Column(
        UUID(as_uuid=True), primary_key=True, index=True, default=uuid.uuid4
    )

    name = Column(String, nullable=False)
    email = Column(String, unique=True, index=True, nullable=False)
    password_hash = Column(String(60), nullable=False)
    is_verified = Column(Boolean, default=False)

    posts = relationship("Post", backref="user")
    likes = relationship("Like", backref="user")

    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), onupdate=func.now())

    def __repr__(self):
        return f"<User(id={self.id}, name={self.name}, email={self.email}, is_active={self.is_verified}>"


class Post(Base):
    __tablename__ = "posts"

    id = Column(
        UUID(as_uuid=True), primary_key=True, index=True, default=uuid.uuid4
    )

    user_id = Column(
        UUID(as_uuid=True),
        ForeignKey("users.id", ondelete="CASCADE"),
        nullable=False,
    )
    content = Column(String(512), nullable=False)

    likes = relationship("Like", backref="post")

    created_at = Column(
        DateTime(timezone=True), server_default=func.now(), index=True
    )
    updated_at = Column(DateTime(timezone=True), onupdate=func.now())

    @property
    def time(self):
        if self.updated_at:
            return self.updated_at
        return self.created_at

    def __repr__(self):
        return f"<Post(id={self.id}, content={self.content[:10]}>"


class Like(Base):
    __tablename__ = "post_likes"

    user_id = Column(
        UUID(as_uuid=True),
        ForeignKey("users.id", ondelete="CASCADE"),
        nullable=False,
    )
    post_id = Column(
        UUID(as_uuid=True),
        ForeignKey("posts.id", ondelete="CASCADE"),
        nullable=False,
    )

    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), onupdate=func.now())

    __table_args__ = (PrimaryKeyConstraint("user_id", "post_id"),)

    def __repr__(self):
        return f"<Like(user_id={self.user_id}, post_id={self.post_id}>"